Buggy code:
@ SuppressWarnings ( "unchecked" ) public abstract class ClassUtils { public static final String ARRAY_SUFFIX = "[]" ; private static final String INTERNAL_ARRAY_PREFIX = "[" ; private static final String NON_PRIMITIVE_ARRAY_PREFIX = "[L" ; private static final char PACKAGE_SEPARATOR = '.' ; private static final char INNER_CLASS_SEPARATOR = '$' ; public static final String CGLIB_CLASS_SEPARATOR = "$$" ; public static final String CLASS_FILE_SUFFIX = ".class" ; private static final Map < Class < ? > , Class < ? > > primitiveWrapperTypeMap = new HashMap < Class < ? > , Class < ? > > ( 8 ) ; private static final Map < Class < ? > , Class < ? > > primitiveTypeToWrapperMap = new HashMap < Class < ? > , Class < ? > > ( 8 ) ; private static final Map < String , Class < ? > > primitiveTypeNameMap = new HashMap < String , Class < ? > > ( 32 ) ; private static final Map < String , Class < ? > > commonClassCache = new HashMap < String , Class < ? > > ( 32 ) ; private static void registerCommonClasses ( Class < ? > ... commonClasses ) { } public static ClassLoader getDefaultClassLoader ( ) { } public static ClassLoader overrideThreadContextClassLoader ( ClassLoader classLoaderToUse ) { } @ Deprecated public static Class < ? > forName ( String name ) throws ClassNotFoundException , LinkageError { } public static Class < ? > forName ( String name , ClassLoader classLoader ) throws ClassNotFoundException , LinkageError { } public static Class < ? > resolveClassName ( String className , ClassLoader classLoader ) throws IllegalArgumentException { } public static Class < ? > resolvePrimitiveClassName ( String name ) { } @ Deprecated public static boolean isPresent ( String className ) { } public static boolean isPresent ( String className , ClassLoader classLoader ) { } public static Class < ? > getUserClass ( Object instance ) { } public static Class < ? > getUserClass ( Class < ? > clazz ) { } public static boolean isCacheSafe ( Class < ? > clazz , ClassLoader classLoader ) { } public static String getShortName ( String className ) { } public static String getShortName ( Class < ? > clazz ) { } public static String getShortNameAsProperty ( Class < ? > clazz ) { } public static String getClassFileName ( Class < ? > clazz ) { } public static String getPackageName ( Class < ? > clazz ) { } public static String getQualifiedName ( Class < ? > clazz ) { } private static String getQualifiedNameForArray ( Class < ? > clazz ) { } public static String getQualifiedMethodName ( Method method ) { } public static String getDescriptiveType ( Object value ) { } public static boolean matchesTypeName ( Class < ? > clazz , String typeName ) { } public static boolean hasConstructor ( Class < ? > clazz , Class < ? > ... paramTypes ) { } public static < T > Constructor < T > getConstructorIfAvailable ( Class < T > clazz , Class < ? > ... paramTypes ) { } public static boolean hasMethod ( Class < ? > clazz , String methodName , Class < ? > ... paramTypes ) { } public static Method getMethodIfAvailable ( Class < ? > clazz , String methodName , Class < ? > ... paramTypes ) { } public static int getMethodCountForName ( Class < ? > clazz , String methodName ) { } public static boolean hasAtLeastOneMethodWithName ( Class < ? > clazz , String methodName ) { } public static Method getMostSpecificMethod ( Method method , Class < ? > targetClass ) { } private static boolean isOverridable ( Method method , Class targetClass ) { } public static Method getStaticMethod ( Class < ? > clazz , String methodName , Class < ? > ... args ) { } public static boolean isPrimitiveWrapper ( Class < ? > clazz ) { } public static boolean isPrimitiveOrWrapper ( Class < ? > clazz ) { } public static boolean isPrimitiveArray ( Class < ? > clazz ) { } public static boolean isPrimitiveWrapperArray ( Class < ? > clazz ) { } public static Class < ? > resolvePrimitiveIfNecessary ( Class < ? > clazz ) { Assert . notNull ( clazz , "Class<seq2seq4repair_space>must<seq2seq4repair_space>not<seq2seq4repair_space>be<seq2seq4repair_space>null" ) ; <START_BUG> return clazz . isPrimitive ( ) ? ClassUtils . primitiveTypeToWrapperMap . get ( clazz ) : clazz ; <END_BUG> } public static boolean isAssignable ( Class < ? > lhsType , Class < ? > rhsType ) { } public static boolean isAssignableValue ( Class < ? > type , Object value ) { } public static String convertResourcePathToClassName ( String resourcePath ) { } public static String convertClassNameToResourcePath ( String className ) { } public static String addResourcePathToPackagePath ( Class < ? > clazz , String resourceName ) { } public static String classPackageAsResourcePath ( Class < ? > clazz ) { } public static String classNamesToString ( Class ... classes ) { } public static String classNamesToString ( Collection < Class > classes ) { } public static Class [ ] getAllInterfaces ( Object instance ) { } public static Class < ? > [ ] getAllInterfacesForClass ( Class < ? > clazz ) { } public static Class < ? > [ ] getAllInterfacesForClass ( Class < ? > clazz , ClassLoader classLoader ) { } public static Set < Class > getAllInterfacesAsSet ( Object instance ) { } public static Set < Class > getAllInterfacesForClassAsSet ( Class clazz ) { } public static Set < Class > getAllInterfacesForClassAsSet ( Class clazz , ClassLoader classLoader ) { } public static Class < ? > createCompositeInterface ( Class < ? > [ ] interfaces , ClassLoader classLoader ) { } public static boolean isVisible ( Class < ? > clazz , ClassLoader classLoader ) { } }

Fix:
return ( clazz . isPrimitive ( ) ) && ( clazz != ( void . class ) ) ? ClassUtils . primitiveTypeToWrapperMap . get ( clazz ) : clazz ;